Cerro Gordo County Census Images
| Year | County | Township | Surnames |
|---|
| 1895 | Cerro Gordo | Mason City | Clark, Simmons, Wineman |
| 1900 | Cerro Gordo | Mason City | Clark, Simmons, Wineman |
| 1910 | Cerro Gordo | Mason City | Clark, Simmons, Wineman |
| 1920 | Cerro Gordo | Mason City | Clark, Wineman |
| 1925 | Cerro Gordo | Mason City | Chaney, Higdon, Squire |
